Finding the Fourth Proportional to 2,086.57, 3,126.21 and 1,860.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.57 : 3,126.21 = 1,860.58 : x
2. Step 2: Convert to fraction form
   2,086.57/3,126.21 = 1,860.58/x
3. Step 3: Cross multiply
   2,086.57x = 3,126.21 × 1,860.58
4. Step 4: Simplify right side
   2,086.57x = 5,816,563.80
5. Step 5: Solve for x
   x = 5,816,563.80/2,086.57
6. Step 6: Final answer
   x = 2,787.62